The aim of my first project here is :
- To experiment with 3D printing
- To experiment with small driveunits/chassis for N finescale
The prototype design was made by Hilding Carlson in Sweden. I Norway we had three at NSB and one at the private Askim-Solbergfossbanen. The NSB railbuses was typically painted redbrown with a yellow stripe. The Solbergfoss railbus was painted silver. Today this one is preserved by NJK (the norwegian railway preservation group) http://www.njk.no/
The kit has a quite nice plastic superstructure. The chassis is also cast in plastic with a Mashima motor and NEM wheels. I have not tested the chassis / drive because I wanted to try out some ideas about making a chassis in 3D printed metal and I wanted the finescale wheel standard. I also wanted to see how a 6mm dia motor behaved in this model and I wanted free see through windows. On top of that I wanted DCC + sound +light
So far I have designed a new splitframe chassis / drive and got it printed in brass from Imaterialise https://i.materialise.com/ . From Shapeways http://www.shapeways.com/ I have got printed in FXD (Frosted Extreme Detail) a two part pivot for one axle. Only the rigid axle will be driven. In POM I have turned muffs for the split axles and pins to connect the two chassis halves. So far this have worked out well.
This have now been adjusted to a rectangular hole by filing.
|The kit includes etched part|
In the next picture I have included the two part
plastic chassis and the etched parts included in the kit.
|The 3D printed halves|
|All the parts I have so far.|
On top is the loudspeaker from CT elektronik http://www.tran.at/ then the FS wheels turned in steel on my old unimat3 lathe. The 1mm dia axle is not separate, but turned integral with the wheel. It gives a wobblefree wheel. Between the frames is a 6x12mm motor from Mikroantriebe with worm (1:18) The white bands are turned from POM plast on my lathe, 0.2mm thick. The decoder is from CT but will be replaced by a CT sounddecoder. Under the frames : The two taps to assembe the frames are turned POM and the two part pivot for one axle 3D printed from FXD
|Seen assembled from the underside|
|Seen assembled from the side|
|Seen assembled from above|
|with the superstructure added shows the see through effect|